CVE-2023-3866

MEDIUM EPSS 96.2%
Published Aug 16, 202510mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Aug 16, 2025 10mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in the compound request This patch validate session id and tree id in compound request. If first operation in the compound is SMB2 ECHO request, ksmbd bypass session and tree validation. So work->sess and work->tcon could be NULL. If secound request in the compound access work->sess or tcon, It cause NULL pointer dereferecing error.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
96.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥5.15  –  <5.15.121
linuxlinux_kernel*≥5.16  –  <6.1.36
linuxlinux_kernel*≥6.2  –  <6.3.10
linuxlinux_kernel6.4any
linuxlinux_kernel6.4any
linuxlinux_kernel6.4any
linuxlinux_kernel6.4any
linuxlinux_kernel6.4any
linuxlinux_kernel6.4any
linuxlinux_kernel6.4any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/5005bcb4219156f1bf7587b185080ec1da08518e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/854156d12caa9d36de1cf5f084591c7686cc8a9d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d1066c1b3663401cd23c0d6e60cdae750ce00c0f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eb947403518ea3d93f6d89264bb1f5416bb0c7d0
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/5005bcb4219156f1bf7587b185080ec1da08518e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/854156d12caa9d36de1cf5f084591c7686cc8a9d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d1066c1b3663401cd23c0d6e60cdae750ce00c0f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eb947403518ea3d93f6d89264bb1f5416bb0c7d0
    Patch